Exhaust apparatus for locomotives



(No Model.)

E. LONGSTRETH. Exhaust Apparatus for Locomotives.

Patented Oct. 5,188.0.

)Wm/fosfo- NITED STATES .maar Prien.

EDWARD LONGSTRETH, OF PHILADELPHIA, PENNSYLVANIA.

EXHAUST APPARATUS FOR LOCOMOTIVES.

SPECIFICATION forming part of Letters Patent No. 232,990, dated October 5, 1880.

Application tiled June 9, 1880.

To all whom it may concern:

Be it known that I, EDWARD LoNGs'rnE'ri-r, a citizen of the United States, residing in Philadelphia, Pennsylvania, have invented an Improvement in Exhaust Apparatus Jfor Locomotives, of which the following is a specification.

My invention relates to an iml'novement in the construction of the exhaust apparatus for preventing or diminishing the noise due to the escape oi' exhaust-steam in locomotives and other engines, for which Letters Patent No. 186,587 were granted to my assignecs Jannary 23, 1877, the object or' my present iniprovements being a convenient, economical, and effective manner ot' applying my patented invention to au ordinary locomotive-engine.

In the accompanying drawings, Figure l is a transverse section of the smoke-box end ot' a locomotive-boiler and of one of the cylinders of the engine, the section being through the exhaust port and pipe, exhaust-chamber, and nozzle; and Fig. 2, a section on the line 1 2, Fig. l, showing the side ot' the smokebox and part ot' the body or barrel ofthe boiler.

Those parts only ot the engine and boiler are shown which are necessary to illustrate my improvements.

B is part ofthe body or barrel ofthe boiler, and A the smoke-box; D, one of the cylinders ot' the engine; and a, the exhaustport communicating, through the exhaust-pipe b, with the exhaust-chest G, and the latter with the exhaust-nozzle H.

I prefer to cast the two cylinders, (one only of which is shown in the drawings,) the exhaust-pipe, and the greater portion ofthe exhaust-chest G, as well as the lower portion of the exhaust-nozzle, in one piece, as shown, the

casting being secured to the shell ofthe smokebox A and to the frame of the engine, of which frame f is one of the bars.

It is important that the exhaust-chest should be as spacious as circumstances will permit', hence I secure to the under side ofthe chest a basin-like extension, h, by which the desired enlargement ot' the exhaust-chamber is much more economically made than it' the said extension formed a part ofthe casting comprising the cylinders, exhaust-pipes, and upper portion of the chest.

(No model.)

My invention has no relation to the steam pipes, passages, and ports; hence it will suffice to remark that each steam-pi pe in the smokebox communicates, through passages c, adjoining the exhaust-passage, with one ot' the valvechests of the engine.

In the discharge-pipe or exhaust-nozzle H, near the lower end ofthe same, is an internal iiange, which leaves a contracted opening, t', for the passage of the exhauststeam, so that the latter, after leaving the cylinder and traversing the exhaust-pipe b, is permitted to expand in the chest G, whence the only outlet is through the contracted opening i into the nozzle.

The sharp intermittent noises which accompany themovements ofalocomotive, and which are generally attributed to the escape ot' puffs of exhaust-steam at the chimney, really originate at the point where it is forcibly expelled from the cylinder, the chimney being simply a conductor of the sound, and this noise may be prevented or materially lessened by permitting the exhaust-steam to suddenly expand at a point as near as practicable to that where the sound originates, and then to escape through a contracted outlet, as fully described in the said Patent No. 186,587, the expansionchamber G being, in thepresent instance, situated between the two cylinders and below the smoke-boX-an economical arrangement as regards construction.

rPhere may be two exhaust-chests, G, one for each cylinder; but the single chest common to both cylinders is the most economical and has proved to be eflicient in practice.

My invention is applicable to that class of locomotives in which compressed air or gas is used in place of steam.

I claim as my invention- The exhaust-chest G, formed by a combination of the casting which connects the two cylinders with the extension h., made separate from the casting, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribin g Witnesses.

EDWARD LONGSTRLETH.

Witnesses:

Janus F. TOBIN, HARRY SMITH. 

